Testing for ions (1 Viewer)

[Magical Kebab]

For the dot point
deduce the ions present in a sample from the results of tests

Is it better to memorize something like the flow charts on the dot point on hsc online http://hsc.csu.edu.au/chemistry/core/monitoring/chem943/943net.html#net4

Or is it better to memorize a table that shows the tests and results for each ion like something on surfing chem page 11 if anyone has it.

Or any better alternatives?
Thanks.

 

[someth1ng]

You really need to memorise both the flow chart AND the solubility rules.

 

[Magical Kebab]

You really need to memorise both the flow chart AND the solubility rules.

So not the tables, just the flow charts on hsc online and solubility rules?

 

[someth1ng]

Not sure which table you're referring to but yes, flow charts and solubility rules.

 

[Magical Kebab]

Not these but something similar for the tables.
http://www.easychem.com.au/monitoring-and-management/manufactured-products/ion-tests

 

[Kimyia]

I'd say learn the flowchart. You need to know what order to conduct the tests in so that your end result will tell you whether a specific ion is present or not, rather than tell you that it could be one of several ions present if the steps aren't conducted in order and multiple ions could have given you the same result - which you can't really get from a table.

 

[someth1ng]

The main idea is to precipitate out 1 ion at a time, that way, you can eliminate things one by one.

 

[Magical Kebab]

Thanks guys.
Probs worst and most useless dot point imo anyway.

 

[someth1ng]

Thanks guys.
Probs worst and most useless dot point imo anyway.

It's bad because there's no clear way of doing it and schools hardly teach it properly.

 

[albertcamus]

This is better than half of CMAM though so not too bad I guess.